This truck is really turning out to be a sour lemon, What I have currently is a growing noise and a vibration that starts about 30mph and is really noticeable up to 65-70mph. At first I thought that it was a wheel bearing. But upon jacking the truck up both sides roll smoothly. Then i was told to look at the u-joints but there is no play in the u-joints. Truck shifts smoothly. But this noise/vibrations gets more noticeable when accelerating hard or going up hill. and it sounds and feels like its originating from the passenger side front of the vehicle!! Any ideas??? Frontier guy??

Check the driveshaft to see if the u-joints for the front and rear on the same "plane", meaning the drive shaft two sections are on the same position(NO twist). This happens when the center carrier is replaced and not assembled on the correct spline. I may not have explained it very well, so look at it and see what it looks like.

no they dont turn when i jack the truck up. This is driving me crazy..i replaced the rigght front wheel bearing and propeller shaft u-jionts this week and niether fixed this problem. I cant really afford to take it to a mechanic or the dealership..they charge 100's just to trouble shoot and then more for parts and labor. Thats why im trying so hard to track this down on my own. I did notice that when i jacked the truck up and turned the wheel that the brake pads were squeaking cause they in constant contact with the rotor. And I was told that the rotor on the same side needs replaced. Could this be causing the niose?

Noise like this are sometimes a pain to locate and fix. Many decades ago I had a new Pinto station wagon. Made a clunking noise over bumps and pulling into the driveway. I finall got under it and started at the back bumper, pulling, pushing and looking at everything on both sides as I moved forward. To my surprise, Ford had not put any nuts on the bolts holding the leaf springs to the shckles and the bolts were about halfway worked out of their bore!!!!

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